setRecursiveFilteringEnabled() not available in qt4

[mlte]

Hi everyone!

I have implemented a Hierarchical table using the QTreeView in Qt5.
I am using the QSortFilterProxyModel() to implement the search feature in the QTreeView. It is working okay in Qt5.

proxyModel = new QSortFilterProxyModel(this);
    proxyModel->setSourceModel(model_t);
    proxyModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
    proxyModel->setFilterKeyColumn(0);
    ui->treeView->setModel(proxyModel);
    ui->treeView->setSortingEnabled(true);
    proxyModel->setRecursiveFilteringEnabled(true);
    ui->treeView->expandAll();

proxyModel = new QSortFilterProxyModel(this);
    proxyModel->setSourceModel(model_t);
    proxyModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
    proxyModel->setFilterKeyColumn(0);
    ui->treeView->setModel(proxyModel);
    ui->treeView->setSortingEnabled(true);
    proxyModel->setRecursiveFilteringEnabled(true);
    ui->treeView->expandAll();

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But now I want to run my code in the Qt4. However, I am getting the error that Qt 4 doesn't recognize "proxyModel->setRecursiveFilteringEnabled(true);" .

Is there any alternative for "proxyModel->setRecursiveFilteringEnabled(true);" in Qt 4?